Something my concrete guy suggested.

[Bruce4310TX]

I'm sure what I'm about to show you is something done often and has probably been discussed on here serveral times, but I'd never seen it done and it works great. My new garage faces west into the weather. When it was time to do concrete, I told the guy doing the job,that I wanted a drain in front of the garage doors to keep the water coming under them to a minimum. He said we would be 2" above the outside concrete and suggested doing what is shown in the following pictures. Any water that does get under the door, cannot go anywhere inside and drains back outside.

Thats pretty much a standard building practice.......

 

[NUTTSGT]

Seems like you could cut drain grooves perpendicular to the door out in slabs that are flat that allow water to flow out.

That might work in the South but I wouldn't do it in the north. That will create a place for the water to lay in and freeze. In a few short years, it'll have the concrete all cracked and broken in between those grooves.

 

[jdieter]

Another way to seal the door bottom is embed a pipe in the concrete and leave a slight portion above the finished concrete.

 

[johnny ro]

We call those ankle-breakers. Step on that lip wrong and you will know what I mean. Had numerous people fall because of them. The builder did that to the garage doors of my house even though I asked them not to. They weren't needed. The garage doors face south and the same effect can be gained by sloping the threshold towards the outside .Think about it. Why would you need an inch and a half lip behind the door base. There will never be water that high against the bottom of the door. Half an inch would have been plenty.

I just had a detached 3 car built and specifically forbid that concrete contractor from doing that to the door thresholds. Had him slope them from the door closure line outward. Much better. And, no more liability for someone twisting their ankle or tripping. including me.

Snowmelt backs in my garage door which does not face into the wind. Agree the depression would work without edges.

 

[Cougar]

What about something like these.

http://www.autogeek.net/garage-door-seal.html?gclid=CMCvx8yI_LMCFYVFMgodFTQAMQ

 

[Norcal]

My shop & garage has that feature that the OP has, it works well but is a PITA to roll my Unisaw outside over it, if I do it again the concrete would not have a lip, instead would be tapered towards the lower apron to make moving rolling equipment easier. Larger casters would make it easier but the mobile base on the Uni only has 2" or so casters.

 

[coljar]

My shop & garage has that feature that the OP has, it works well but is a PITA to roll my Unisaw outside over it, if I do it again the concrete would not have a lip, instead would be tapered towards the lower apron to make moving rolling equipment easier. Larger casters would make it easier but the mobile base on the Uni only has 2" or so casters.

My welders and crane have larger casters on them, but I can see where smaller ones might be a pain.

 

[Herb67SS]

It's worse than a PITA. It's down right dangerous. it's already caused more than one incident in my home.

You would never put an inch and a half step in a sidewalk or any other threshold, why put one in the biggest threshold in your house?

Just slope the outer portion of the threshold like shown by dirttracker18's diagram and you,ll be fine.

I'll never allow that in another house I build.

 

[dirttracker18]

It's worse than a PITA. It's down right dangerous. it's already caused more than one incident in my home.

You would never put an inch and a half step in a sidewalk or any other threshold, why put one in the biggest threshold in your house?

Just slope the outer portion of the threshold like shown by dirttracker18's diagram and you,ll be fine.

I'll never allow that in another house I build.

All it meant was a small depression in the form where the service door is and trowel the concrete down over a 4-6 inch length. I would think you don't even need the depression in the form to do it.

FWIW I have never had water come in under my door.

 

[Justanoldguy]

It's worse than a PITA. It's down right dangerous. it's already caused more than one incident in my home.

You would never put an inch and a half step in a sidewalk or any other threshold, why put one in the biggest threshold in your house?

Always been about 3/4 inch here in NZ and I've
never heard of anyone getting hurt because of it.
1 1/2 is just plain crazy.

 

[Armed Bear]

my driveway slopes down, so it's pretty much impossible for any water to get in the garage during rain.

 

[Tucko]

I've never seen that before. Seems to me it would cause water to pool up and soak the bottom of your studs. You want water to flow AWAY from your building. My garage floor is poured on a slope from back to front, diverting water out the door.

 

[Engineer61]

I've lived in Colorado most of my life, and I have never seen that done here. Since a typical winter day has the temperature crossing the freezing point twice, once up and once down, that would simply mean your garage door is frozen in place any morning there was any moisture at all. It may work in the South or Southern California or New Zealand, but here it's a really dumb idea.

 

[RHD 4 LIFE]

I'm not a fan. I'll post a pic later of my garage abortion job that the builder did! He built this house with leftover material from the rest of the street development on the street and this was his house for a bit near the end of the projects.

 

[Spudland_Dave]

Heres a pic of what i was describing earlier...we did have some driving rain during Sandy and not a hair of it made it into the garage.